M471KI8AE

The NuMicro M471KI8AE is a 32-bit microcontroller based on Arm Cortex-M4F core, with DSP instruction set and single-precision floating-point unit (FPU), targeted for smart home appliance applications. For the growing requirement of the safety functions on the home appliance, the M471KI8AE provides certified Software Test Library (STL) and an application note for IEC60730-1 Class B Annex H. This certified STL can significantly reduce the development time and efforts to pass IEC60730-1 Class B certification for home appliances. The M471KI8AE runs up to 120 MHz, and features 2.5V to 5.5V wide operating voltage, -40°C to 105°C wide operating temperature, a variety of packages with wide pin pitch, and excellent high immunity characteristics by ESD HBM 8 KV and EFT 4.4 KV, which greatly meets the rigid requirements for stability, reliability and safety of home appliance systems.

As the new smart function added on home appliances, the M471KI8AE provides up to 512 KB dual-bank of Flash memory for code storage, 64 KB SRAM for run time operation and 32 KB independent Data Flash for parameters. The dual bank design of 512 KB Flash memory supports the Firmware update through the Over-The-Air (FOTA) process. Additionally, in response to the code security requirements, the M471KI8AE supports Execute-Only Memory (XOM) function to protect confidential program code information from being stolen in the run-time. Finally, the 32 KB independent Data Flash provides a 256 Bytes page erasing unit to make the parameter data update and access more efficiently. Besides, a peripheral direct memory access (PDMA) is provided to reduce the data access overhead of CPU core to peripherals.

The M471KI8AE supports plenty of peripherals, including a Customize IR receiver (CIR) to communicate with remote controller, up to 24 channels of 16-bit PWM, 6 sets of UART, 2 sets of SPI/I2S, 2 sets of I²C, and a real-time clock (RTC).

The M471KI8AE also provides rich analog peripherals including 2 sets of analog comparators, up to 24 channels of 12-bit SAR ADC, and 1 channel of 8-bit DAC. The M471KI8AE also integrates a pseudo random number generator (PRNG) to support the requirement for encryption and decryption of smart home appliances.

Target Applications:

Washing Machine
Refrigerator
Air Conditioner
PM2.5 Detector
Other Home Appliances
Key Features:

• Operating Characteristics
- Voltage range: 2.5V to 5.5V
- Temperature range: -40°C to 105°C
- ESD HBM 8 kV
- EFT 4.4 kV

• Core
- Up to 120 MHz ARM Cortex-M4F
- DSP instruction set
- Single-precision floating point instructions (FPU)
- Memory Protection Unit (MPU) with eight memory regions

• Memory
- Up to 512 KB Flash memory with dual bank structure supporting Firmware Over-The-Air (FOTA)
- Flash memory supporting up to four regions of eXecute-Only-Memory (XOM)
- 32 KB independent Data Flash with 256 Bytes page erasing unit
- 4 KB user-defined loader ROM (LDROM)
- Up to 64 KB SRAM

• Clocks
- 4 to 24 MHz crystal oscillator
- 32.768 kHz crystal oscillator for RTC
- Internal 48 MHz RC oscillator with ± 1% deviation at -20~85°C and ± 2% deviation at -40°C to 105°C
- Internal 38.4 kHz RC oscillator
- Internal PLL up to 120 MHz

• Power Management
- Supports three power modes: Normal run, Idle and Normal Power-down mode
- Normal run: 353 μA/MHz at 25°C/5V
- Normal Power-down: 27 μA
- Supports wake up from Normal Power-down mode by: RTC, WDT, I²C, Timer, UART, GPIO, EINT, ACMP, CIR0 and BOD

• Timer & PWM
- Four 32-bit timers
- Up to 12 Enhanced PWM with twelve 16-bit counters
- Up to 12 Basic PWM with two 16-bit counters
- One 24-bit count-down SysTick timer
- One watchdog timer
- One window watchdog timer

• Peripheral Direct Memory Access (PDMA)
- Up to 6 channels
- Channel can be operated by software trigger, UART, SPI, EPWM, TIMER, ADC, DAC, ACMP and I²C

• Analog Peripheral
- 1 set of 12-bit, up to 24-ch, 1.8 MSPS SAR ADC
- 1 set of 8-bit, 200 kSPS DAC
- 2 sets of analog comparators
- Built-in internal reference voltage

• Communication Interface
- 1 set of Customize IR receiver (CIR)
- Up to 6 sets of UART interfaces with IrDA (2 sets support LIN)
- Up to 2 sets of I²C interfaces with SMBus/PMBus (Up to 1 Mbps)
- Up to 2 sets of SPI/I²S interfaces (up to 24 MHz in SPI Master mode)

• Pseudo Random Number Generator (PRNG)

• Cyclic Redundancy Calculation (CRC)

• Real Time Clock (RTC)

• Up to 119 I/O pins with interrupt capability

• IEC60730-1 Class B
- Supports certified IEC60730-1 Class B Software Test Library (STL)

• Development Platform Support
- Arm Keil RVMDK and IAR EWARM IDE
- Free GNU compiler with Eclipse IDE support
- ICP (In Circuit Programmer) support for updating internal code via Nu-Link debugger
- ISP (In System Programmer) support for updating code through UART, SPI, I²C, RS-485 peripheral interfaces
- Pin Viewer for real time monitoring the status of all I/O pins
- PinConfigure tool for pin assignment, initial code generation and OrCAD/Protel part generation

• 96-bit Unique ID (UID)

• 128-bit Unique Customer ID (UCID)

• Package
- LQFP128: Body Size 14 mm x 14 mm, Pin Pitch 0.4 mm

Further Reading- https://www.nuvoton.com/support/technical-support/technical-articles/TSNuvotonTechBlog-000357/